Tool for assembling and disassembling piston clamp spring

Abstract

The utility model discloses a tool for assembling and disassembling a piston clamp spring, which comprises two clamping arms which are connected with each other, each clamping arm is provided with a clamping section, and the two clamping sections can be relatively close to each other or relatively far away from each other; the piston spring dismounting device further comprises two chucks, the chucks are detachably connected to the corresponding clamping sections, the connecting positions are adjustable in the axial direction and the circumferential direction, clamping grooves are correspondingly formed in the ends, away from the clamping sections, of the two chucks, and in the working state, the chucks are inserted into spring dismounting grooves of a piston in a one-to-one correspondence mode. And the piston clamp spring is positioned in the clamping groove. According to the utility model, the piston clamp spring can be accurately assembled and disassembled, and the mounting precision is ensured; the piston and the piston clamp spring are prevented from being damaged, and the requirement for lossless disassembly and assembly of the piston clamp spring is met; for different types of piston clamp springs, only corresponding chucks need to be replaced, the application range is wider, and the cost is saved.

Description

Technical Field

[0001] The utility model relates to the technical field of mechanical tooling, in particular to a tool for loading and unloading a piston retaining spring. Background Art

[0002] The piston circlip is assembled in the circlip grooves on both sides of the piston pin hole to fix the piston pin.

[0003] At present, the assembly of piston retaining rings in the laboratory uses a special tooling, which specifically includes two semicircular clamps and fastening bolts. During the assembly process, first, place the piston retaining ring into the retaining ring groove of the tooling, tighten the fastening bolts, so that the tooling tightens the piston retaining ring and makes the outer diameter of the piston retaining ring smaller than the inner diameter of the pin hole; then, insert the tooling locating pin into the inner hole of the piston pin to ensure positioning, and finally, use a hammer to hammer the piston retaining ring into the piston pin hole.

[0004] The current problem with assembling piston retaining rings in the laboratory is that each type of piston must have an assembly tool that matches it. Changing the design of the piston pin seat, piston pin, piston retaining ring and retaining ring groove requires replacing the tooling, and the scrapping of the old tooling causes unnecessary waste. In addition, the force of the hammer's hammering cannot be restrained, and the worker's experience is the only factor. The piston is not clearly positioned, and the hammering process can easily cause the piston to deform. The piston pin is a positioning part, and the weight-reducing hole in the middle of the pin, i.e., the inner hole, is used to ensure that the positioning tool is coaxial with the piston pin. If a piston pin without an inner hole is used, it will be difficult to position the tooling during the installation process.

[0005] At the same time, in laboratories and after-sales markets, piston retaining rings are removed by using disassembly tools such as screwdrivers and metal rods to pick out the piston retaining rings from the retaining ring grooves. The disassembly tools may damage the piston. The manual prying and disassembly process may also cause the piston retaining ring groove and the retaining ring groove to deform due to stress, and even cause the pin hole to deform, and produce irreversible burrs at the junction of the retaining ring groove and the pin hole. The deformation and burrs will affect the secondary assembly of the piston pin.

[0006] For piston pin holes that have deformation and burrs, the current secondary assembly method in the laboratory is to use external force to knock the stuck piston pin into the piston pin hole, but the entire assembly process will bring more serious deformation risks to the piston, which is not conducive to the test verification after secondary assembly. For pistons that have completed the test, the deformation of the piston pin hole is also not conducive to the detection and analysis of the piston pin hole.

[0007] In the aftermarket, the use of this disassembly and assembly method for secondary installation of pistons also has application risks. More seriously, during the disassembly and assembly of the retaining ring, the inconvenient disassembly and assembly is likely to cause damage to the piston, resulting in more unnecessary losses.

[0008] In summary, how to provide a tool for loading and unloading piston retaining rings to meet the needs of laboratories and after-sales markets for non-destructive disassembly and assembly of piston retaining rings is a technical problem that technical personnel in this field urgently need to solve. Utility Model Content

[0009] The utility model aims to provide a tool for non-destructive assembly and disassembly of a piston retaining ring, so as to meet the needs of laboratories and after-sales markets for non-destructive assembly and disassembly of piston retaining rings.

[0010] In order to solve the above technical problems, the utility model provides a tool for loading and unloading a piston retaining ring, comprising two mutually connected clamping arms, wherein the clamping arms have clamping sections, and the two clamping sections can be relatively close to or relatively far away from each other;

[0011] It also includes two chucks, which are detachably connected to the corresponding clamping sections, and the connection positions are adjustable along the axial and circumferential directions. The two chucks are correspondingly provided with clamping grooves at one end away from the clamping section. In the working state, the chucks are inserted into the spring unloading grooves of the piston one by one, and the piston retaining ring is located in the clamping groove.

[0012] The working process of the tool for mounting and dismounting a piston retaining spring of the utility model when installing the piston retaining spring is as follows:

[0013] First, two suitable chucks are selected according to the wire diameter of the piston circlip, that is, the piston circlip can be placed inside the clamping groove of the chuck, and the chucks are connected to the clamping sections one by one;

[0014] Secondly, place the piston retaining spring to be installed between the two clamping grooves, and then control the two clamping arms to be relatively close to clamp the piston retaining spring, so that the diameter of the piston retaining spring is smaller than the diameter of the retaining spring groove in the piston. Of course, as long as the piston retaining spring can be smoothly installed into the unloading spring groove, the deformation of the piston retaining spring should not be too large to prevent the piston retaining spring from being bent and deformed;

[0015] Then, move the tool to a position close to the piston, and insert the free ends of the chucks into the spring unloading grooves of the piston one by one. At this time, the piston retaining spring is located in the plane where the retaining spring groove is located. The two clamping arms are controlled to move away from each other, and the piston retaining spring is released. Under the action of the restoring force, the piston retaining spring is automatically clamped in the retaining spring groove.

[0016] Finally, withdraw the chuck from the unloading spring groove to complete the installation of the piston retaining ring.

[0017] The working process of the tool for mounting and disassembling the piston retaining spring of the utility model when disassembling the piston retaining spring is as follows:

[0018] First, two suitable chucks are selected according to the wire diameter of the piston circlip, that is, the piston circlip can be placed inside the clamping groove of the chuck, and the chucks are connected to the clamping sections one by one;

[0019] Secondly, the tool is moved to a position close to the piston, and the free ends of the chucks are inserted into the spring unloading grooves of the piston one by one, and the two clamping arms are controlled to be relatively close to each other to clamp the piston retaining spring, so that the diameter of the piston retaining spring is smaller than the diameter of the retaining spring groove in the piston, so that the piston retaining spring can be easily taken out from the retaining spring groove;

[0020] Then, the control chuck is withdrawn from the unloading spring groove, and the piston retaining spring is taken away from the retaining spring groove, thereby completing the removal of the piston retaining spring.

[0021] It can be seen that the tool for loading and unloading piston retaining springs of the utility model can, on the one hand, accurately complete the installation and disassembly of piston retaining springs and ensure the installation position accuracy of the piston retaining springs; and, during the loading and unloading process, it can avoid deformation and damage to the piston and piston retaining springs and avoid unnecessary losses. It can be used in secondary tests, post-test inspections, and secondary use after disassembly to meet the needs of laboratories and after-sales markets for non-destructive disassembly and assembly of piston retaining springs; on the other hand, the chuck and the clamping arm are detachably connected. For different types of piston retaining springs, it is only necessary to replace the corresponding chuck, which meets the loading and unloading needs of different types of piston retaining springs. It has a wider range of applications and avoids unnecessary waste of resources caused by configuring loading and unloading tools for each type of piston retaining spring, thereby saving costs.

[0022] Optionally, the clamping section is provided with a mounting hole, the clamping head passes through the mounting hole, the clamping section is further provided with a limiting hole, an angle is formed between the limiting hole and the axis of the mounting hole, and the limiting hole is connected to the mounting hole;

[0023] It also includes a limiting member, which is detachably installed inside the limiting hole, and the inner end of the limiting member abuts against the peripheral wall of the clamp.

[0024] Optionally, a connecting section is formed at one end of the chuck away from the clamping groove, and one of the connecting section and the mounting hole has spline teeth evenly distributed along the circumference, and the other has spline grooves evenly distributed along the circumference, and the spline teeth can be plugged in and matched with the spline grooves one by one.

[0025] Optionally, the end wall of the connecting section has scale marks arranged along the circumferential direction, and the corresponding side wall of the clamping section is provided with an indication mark at a preset position, and the indication mark points to the scale mark.

[0026] Optionally, the two clamping arms are hinged to each other, the clamping arms form the clamping section on one side of the hinge point and a handle section on the other side, and the two clamping arms can rotate around the hinge to make the two clamping sections relatively close to or relatively far away from each other.

[0027] Optionally, an elastic component is further included, wherein the elastic component is connected between the two handle segments, and when the two handle segments are relatively close to each other, the elastic component is compressed to store energy.

[0028] Optionally, one of the handle segments is a first handle segment, and the other handle segment is a second handle segment.

[0029] The second handle segment is provided with a through hole and also includes a limit rod, which passes through the through hole and is connected to the first handle segment. It also includes two adjusting parts, which are fixedly mounted on the limit rod and the fixed position is adjustable along the axial direction of the limit rod. The two adjusting parts are located on both sides of the second handle segment.

[0030] Optionally, the first handle segment is provided with a receiving hole, the corresponding end of the limiting rod is inserted into the receiving hole, the corresponding end of the limiting rod is provided with a first connecting hole, the first handle segment is further provided with a second connecting hole, and the second connecting hole and the receiving hole are connected to each other.

[0031] It also includes a fixing member, which is connected to both the first connecting hole and the second connecting hole.

[0032] Optionally, the chuck is vertically connected to the clamping section and further includes an abutment member, which is vertically connected to the clamping section and whose connection position is adjustable along the axial direction of the abutment member. In a working state, the abutment member abuts against the corresponding end face of the piston.

[0033] Optionally, the clamping groove is an arc groove or a rectangular groove. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 A schematic structural diagram of a specific embodiment of a tool for loading and unloading a piston retaining ring provided in the present application;

[0035] Figure 2 for Figure 1 A split diagram of the tool for loading and unloading the piston retaining ring;

[0036] Figure 3 for Figure 1 A partial enlarged view of the tool for loading and unloading the piston retaining ring;

[0037] Figure 4 for Figure 1 A schematic diagram of the structure of the chuck in the tool for loading and unloading the piston retaining ring;

[0038] Figure 5 It is a structural schematic diagram of the piston retaining spring installed on the piston;

[0039] in, Figure 1-Figure 5 The reference numerals in the figures are described as follows:

[0040] 1-clamping arm; 11-clamping section; 11a-mounting hole; 11b-limiting hole; 11c-indicator mark; 12-first handle section; 12a-accommodating hole; 12b-second connecting hole; 12'-second handle section; 12'a-through hole; 13-connecting block;

[0041] 2-chuck; 2a-clamping groove; 21-connecting section; 21a-scale mark; 22-clamping section;

[0042] 3-Limiting parts;

[0043] 4- elastic member;

[0044] 5-limiting rod; 5a-first connecting hole;

[0045] 6-Adjustment piece;

[0046] 7-Fixer;

[0047] 8- abutment member;

[0048] 01-piston; 01a-spring unloading groove; 02-piston retaining ring. DETAILED DESCRIPTION

[0049] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0050] The “plurality” mentioned herein generally means more than two; and when “plurality” is used to indicate the number of certain components, it does not indicate the relationship between the quantities of these components.

[0051] Please refer to Figure 1-Figure 5 , Figure 1 A schematic structural diagram of a specific embodiment of a tool for loading and unloading a piston retaining ring provided in the present application; Figure 2 for Figure 1 A split diagram of the tool for loading and unloading the piston retaining ring; Figure 3 for Figure 1 A partial enlarged view of the tool for loading and unloading the piston retaining ring; Figure 4 for Figure 1 A schematic diagram of the structure of the chuck in the tool for loading and unloading the piston retaining ring; Figure 5 It is a structural schematic diagram of the piston retaining ring installed on the piston.

[0052] The utility model provides a tool for loading and unloading a piston retaining ring, comprising two mutually connected clamping arms 1, wherein the clamping arms 1 have a clamping section 11, and the two clamping sections 11 can be relatively close to or relatively far away from each other;

[0053] It also includes two chucks 2, which are detachably connected to the corresponding clamping sections 11, and the connection position is adjustable along the axial and circumferential directions. The two chucks 2 are correspondingly provided with clamping grooves 2a at one end away from the clamping section 11. In the working state, the chucks 2 are inserted into the spring unloading grooves 01a of the piston 01 one by one, and the piston retaining ring 02 is located in the clamping groove 2a.

[0054] The working process of the tool for mounting and dismounting piston retaining ring of the utility model when installing piston retaining ring 02 is as follows:

[0055] First, two suitable chucks 2 are selected according to the wire diameter of the piston circlip 02, that is, the piston circlip 02 can be placed inside the clamping groove 2a of the chuck 2, and the chucks 2 are connected to the clamping section 11 one by one;

[0056] Secondly, place the piston retaining spring 02 to be installed between the two clamping grooves 2a, and then control the two clamping arms 1 to be relatively close to clamp the piston retaining spring 02, so that the diameter of the piston retaining spring 02 is smaller than the diameter of the retaining spring groove in the piston 01. Of course, as long as the piston retaining spring 02 can be smoothly installed in the unloading spring groove 01a, the deformation of the piston retaining spring 02 should not be too large to prevent the piston retaining spring 02 from being bent and deformed;

[0057] Then, move the tool to a position close to the piston 01, and insert the free ends of the chuck 2 into the spring unloading grooves 01a of the piston 01 one by one. At this time, the piston retaining spring 02 is located in the plane where the retaining spring groove is located. Control the two clamping arms 1 to move away from each other, relax the piston retaining spring 02, and the piston retaining spring 02 is automatically clamped in the retaining spring groove under the action of the restoring force.

[0058] Finally, the chuck 2 is withdrawn from the unloading spring groove 01a to complete the installation of the piston retaining ring 02.

[0059] The working process of the tool for loading and unloading piston retaining ring of the utility model when removing piston retaining ring 02 is as follows:

[0060] First, two suitable chucks 2 are selected according to the wire diameter of the piston circlip 02, that is, the piston circlip 02 can be placed inside the clamping groove 2a of the chuck 2, and the chucks 2 are connected to the clamping section 11 one by one;

[0061] Secondly, the tool is moved to a position close to the piston 01, and the free ends of the chucks 2 are inserted into the spring unloading grooves 01a of the piston 01 one by one, and the two clamping arms 1 are controlled to be relatively close to each other to clamp the piston retaining spring 02, so that the diameter of the piston retaining spring 02 is smaller than the diameter of the retaining spring groove in the piston 01, so that the piston retaining spring 02 can be easily taken out from the retaining spring groove 01a;

[0062] Then, the control clamp 2 is withdrawn from the unloading spring groove 01a, and the piston retaining spring 02 is taken away from the retaining spring groove, thereby completing the disassembly of the piston retaining spring 02.

[0063] It can be seen that the tool for loading and unloading piston retaining springs of the utility model, on the one hand, can accurately complete the installation and disassembly of piston retaining springs 02, and ensure the installation position accuracy of piston retaining springs 02; and, during the loading and unloading process, it can avoid deformation and damage to piston 01 and piston retaining spring 02, and avoid unnecessary losses. It can be used in secondary tests, post-test inspections, and secondary use after disassembly, to meet the needs of laboratories and after-sales markets for non-destructive disassembly and assembly of piston retaining springs 02; on the other hand, the chuck 2 is detachably connected to the clamping arm 1. For different types of piston retaining springs 02, it is only necessary to replace the corresponding chuck 2, which meets the loading and unloading requirements of different types of piston retaining springs 02, has a wider range of applications, avoids unnecessary waste of resources caused by configuring loading and unloading tools for each type of piston retaining spring 02, and saves costs.

[0064] The shape of the clamping groove 2a is not limited, as long as it can limit the piston retaining spring 02. For example, in this embodiment, the clamping groove 2a is an arc groove. In practical applications, the clamping groove 2a can also be a rectangular groove.

[0065] Among them, the chuck 2 and the clamping section 11 can be connected in a variety of ways. For example, in the present embodiment, the clamping section 11 is provided with a mounting hole 11a, and the inner wall of the mounting hole 11a is uniformly distributed with spline teeth along the circumferential direction. The chuck 2 includes an axially connected connecting section 21 and a clamping section 22. The peripheral wall of the connecting section 21 is uniformly distributed with spline grooves along the circumferential direction. The connecting section 21 passes through the inside of the mounting hole 11a, and the spline teeth and the spline grooves are plugged in one by one, so as to realize the circumferential limit connection between the connecting section 21 and the mounting hole 11a.

[0066] The clamping section 11 is also provided with a limiting hole 11b, which is provided with an internal thread. The limiting hole 11b is perpendicular to the axis of the mounting hole 11a, and the limiting hole 11b and the mounting hole 11a are connected to each other. It also includes a limiting member 3, which is in the form of a fastening bolt. The limiting member 3 is installed inside the limiting hole 11b and is threadedly connected. The inner end of the limiting member 3 abuts against the peripheral wall of the chuck 2 to achieve axial limitation of the connecting section 21 and the mounting hole 11a, thereby fixing the chuck 2 to the clamping section 11.

[0067] In this way, when the position of the chuck 2 needs to be adjusted, the limit member 3 can be turned first to loosen the connecting section 21; then, the chuck 2 is pulled out from the inside of the mounting hole 11a, and when the chuck 2 is rotated to the required angle, the chuck 2 is inserted into the mounting hole 11a. At this time, the cooperation between the spline teeth and the spline grooves can ensure that the chuck 2 is always at the required angle, and then the chuck 2 is adjusted axially to make the chuck 2 have a suitable position; finally, the limit member 3 is tightened to make the inner end of the limit member 3 abut against the peripheral wall of the chuck 2 to fix the chuck 2 in the current position.

[0068] It can be seen that the connection method between the chuck 2 and the clamping section 11 in this embodiment is not only simple in structure, but also can improve the installation position accuracy of the chuck 2, ensure that the chuck 2 is always in the required position, and facilitate the subsequent smooth installation and removal of the piston retaining ring.

[0069] In this embodiment, spline teeth are provided on the inner wall of the mounting hole 11a, and spline grooves are provided on the peripheral wall of the connecting section 21. In practical applications, it is also feasible to provide spline grooves and spline teeth on the inner wall of the mounting hole 11a.

[0070] In this embodiment, the limiting hole 11b is perpendicular to the axis of the mounting hole 11a. In practical applications, there is no restriction on the angle between the limiting hole 11b and the mounting hole 11a. It is feasible that the limiting hole 11b and the axis of the mounting hole 11a are at an acute angle or an obtuse angle, as long as there is a certain angle between the axis of the limiting hole 11b and the axis of the mounting hole 11a, the limiting member 3 can achieve the fixing effect of the chuck 2.

[0071] In this embodiment, the limit member 3 is threadedly connected to the limit hole 11b to achieve detachable fixation. In actual applications, it is also feasible to install the limit member 3 inside the limit hole 11b by interference fit. The outer end of the limit member 3 can be exposed from the limit hole 11b to facilitate the detachment of the limit member 3.

[0072] Of course, in this embodiment, the threaded connection between the limiting member 3 and the limiting hole 11b can not only ensure the connection reliability between the limiting member 3 and the limiting hole 11b, but also facilitate disassembly and assembly, which is a more preferred technical solution.

[0073] In addition, in practical applications, the clamping head 2 and the clamping section 11 can also be connected in a variety of ways, such as:

[0074] In the first embodiment, the mounting hole 11a is a round hole, the connecting section 21 is a cylindrical shaft, and the connecting section 21 is matched with the mounting hole 11a with a small gap, so that the connecting section 21 will not shake randomly when inserted into the mounting hole 11a, and when the angle of the chuck 2 needs to be adjusted, the operator can directly rotate the chuck 2 inside the mounting hole 11a to achieve the angle adjustment; at the same time, the clamping section 11 is also provided with a limiting hole 11b, and the limiting hole 11b is provided with an internal thread, and the limiting hole 11b is perpendicular to the axis of the mounting hole 11a, and the limiting hole 11b is provided with an internal thread. The positioning hole 11b is connected to the mounting hole 11a, and also includes a limit member 3, which is in the form of a fastening bolt. The limit member 3 is installed inside the limit hole 11b and is threadedly connected. The limit member 3 is turned so that the inner end of the limit member 3 abuts against the peripheral wall of the chuck 2, thereby realizing the axial limitation of the connecting section 21 and the mounting hole 11a, and then fixing the chuck 2 to the clamping section 11; or the limit member 3 is turned in the opposite direction so that the inner end of the limit member 3 loosens the peripheral wall of the chuck 2, thereby facilitating the adjustment of the axial installation position of the chuck 2.

[0075] In the second embodiment, the mounting hole 11a is a circular hole, and the connecting section 21 is a cylindrical shaft. The connecting section 21 and the mounting hole 11a are matched with a small gap, so that the connecting section 21 will not shake at will when inserted into the mounting hole 11a. When the angle of the chuck 2 needs to be adjusted, the operator can directly rotate the chuck 2 inside the mounting hole 11a to achieve angle adjustment; at the same time, an external thread is arranged on the peripheral wall of the connecting section 21, and also includes two adjusting nuts, which are screwed on the connecting section 21, and the two adjusting nuts are located on both sides of the clamping section 11. When the axial installation position of the chuck 2 needs to be adjusted, the two adjusting nuts can be screwed first to make the two adjusting nuts relatively far away, and then the chuck 2 can be adjusted axially to make the chuck 2 have a suitable position, and then the two adjusting nuts can be screwed in the opposite direction to make the two adjusting nuts relatively close, and clamp the two side walls of the clamping section 11 to achieve axial positioning of the chuck 2.

[0076] In order to adjust the angle of the chuck 2 more accurately, Figure 3 and Figure 4 As shown, in this embodiment, the end wall of the connecting section 21 has a scale mark 21a arranged along the circumferential direction, and the corresponding side wall of the clamping section 11 is provided with an indication mark 11c at a preset position, and the indication mark 11c points to the scale mark 21a.

[0077] In this way, the angle of the clamping head 2 can be accurately adjusted correspondingly through the indicator mark 11c, so that the two clamping heads 2 can be symmetrically arranged.

[0078] The specific form of the indicator mark 11c is not limited, and the indicator mark 11c can be an arrow, a straight line segment, or the like.

[0079] The specific form of the scale mark 21a is not limited, for example, it can be a straight line segment arranged along the circumferential direction, or it can also be a numerical value representing an angle.

[0080] Please continue to refer to Figure 1 and Figure 2 In this embodiment, the two clamping arms 1 are hinged to each other, and the clamping arms 1 form the aforementioned clamping section 11 on one side of the hinge point and a handle section on the other side. The two clamping arms 1 can rotate around the hinge to make the two clamping sections 11 relatively close or relatively far away.

[0081] In this way, the two clamping arms 1 form a scissor-like structure, and the operator can act on the handle section to control the two clamping sections 11 to be relatively close to or relatively far away from each other, which is convenient for applying force and easy to operate.

[0082] In practical applications, there is no limitation on the connection method of the two clamping arms 1. For example, it is feasible for the two clamping arms 1 to form a structure similar to tweezers, that is, the first ends of the two clamping arms 1 are connected together, and the second ends have a spacing, and the clamp 2 can be connected to the second ends of the two clamping arms 1.

[0083] In practical applications, the strength and surface hardness of the clamping section 11 need to be enhanced to increase the service life of the tool; the handle section can also be better designed according to ergonomics.

[0084] Furthermore, in this embodiment, an elastic component 4 is also included. The elastic component 4 is connected between the two handle segments. When the two handle segments are relatively close to each other, the elastic component 4 is compressed to store energy.

[0085] In this way, under the natural state, the two clamping arms 1 will remain in a certain relative position without relative shaking; when the piston retaining spring 02 needs to be installed, the two handle sections can be controlled to be relatively close, and the elastic component 4 can be compressed to store energy. At this time, the two clamping sections 11 are relatively far apart, and then the piston retaining spring 02 is placed inside the two clamping grooves 2a. There is no need for the operator to apply force. Under the action of the restoring force of the elastic component 4, the two clamping sections 11 can be relatively close to clamp the piston retaining spring 02, and even cause the piston retaining spring 02 to produce a certain deformation, thereby ensuring the clamping stability of the piston retaining spring 02. At the same time, it is more labor-saving and reduces the work intensity of the operator.

[0086] The elastic component 4 is preferably a coil spring, and the connection method between the coil spring and the two handle sections is not limited, such as directly welding and fixing; or Figure 2 As shown, the opposite side walls of the two handle sections are provided with connecting blocks 13, and the two ends of the coil spring are fitted with corresponding connecting blocks 13 to achieve the connection between the coil spring and the two handle sections. In practical applications, in order to improve the connection stability of the coil spring, the diameter of the connecting block 13 can be roughly equal to the inner diameter of the coil spring.

[0087] Please continue to refer to Figure 1 and Figure 2 , one of the handle segments is the first handle segment 12, and the other handle segment is the second handle segment 12',

[0088] The second handle section 12' is provided with a through hole 12'a, and also includes a limit rod 5, which passes through the through hole 12'a and is connected to the first handle section 12, and also includes two adjusting members 6, the adjusting members 6 are fixedly mounted on the limit rod 5, and the fixed position is adjustable along the axial direction of the limit rod 5, and the two adjusting members 6 are located on both sides of the second handle section 12'.

[0089] In this way, the second handle segment 12' can move axially relative to the limit rod 5, and the two adjustment members 6 are arranged on both sides of the second handle segment 12', which can limit the movement range of the second handle segment 12'. When the second handle segment 12' moves to abut against the outer adjustment member 6, the two clamping segments 11 can no longer move relatively close to each other, preventing the piston retaining ring 02 from being bent and deformed; when the second handle segment 12' moves to abut against the inner adjustment member 6, the two clamping segments 11 can no longer move relatively far apart, and a suitable distance can be maintained between the two clamping segments 11, which is convenient for the subsequent loading and unloading of the piston retaining ring 02. Therefore, in actual applications, by adjusting the relative positions of the two adjustment members 6, different movement ranges of the second handle segment 12' can be obtained to meet the loading and unloading requirements of different types of piston retaining rings 02.

[0090] The adjusting member 6 is fixedly mounted on the limiting rod 5, and the fixed position is adjustable along the axial direction of the limiting rod 5, which can be implemented in a variety of ways:

[0091] As in the present embodiment, an external thread is arranged on the peripheral wall of the limiting rod 5, and the two adjusting members 6 are adjusting nuts. The adjusting nuts are fitted on the limiting rod 5 and are threadedly connected. The position of the limiting rod 5 can be adjusted by turning the adjusting nuts.

[0092] In practical applications, the adjusting member 6 can also be in the form of a clamp. For example, the adjusting member 6 is an annular structure and is broken along the circumferential direction. Connecting parts extending outward are respectively provided at the breaking parts. The two connecting parts are respectively provided with a through hole for the fixing bolt to pass through. During the installation process, the fixing bolt can be released and the adjusting member 6 can be installed on the limiting rod 5. Then, when the adjusting member 6 is moved to the appropriate position, the fixing bolt can be tightened to keep the adjusting member 6 in the current position.

[0093] There is no restriction on the connection mode between the limiting rod 5 and the first handle segment 12. For example, the limiting rod 5 and the first handle segment 12 can be directly welded and fixed; or, in the present embodiment, the first handle segment 12 is provided with a receiving hole 12a, the corresponding end of the limiting rod 5 is inserted into the receiving hole 12a, the corresponding end of the limiting rod 5 is provided with a first connecting hole 5a, the first handle segment 12 is further provided with a second connecting hole 12b, and the second connecting hole 12b and the receiving hole 12a are connected to each other.

[0094] It also includes a fixing member 7, which is connected to both the first connecting hole 5a and the second connecting hole 12b.

[0095] There is no limitation on the connection method between the fixing member 7 and the first connection hole 5a and the second connection hole 12b, for example:

[0096] In this embodiment, the first connection hole 5a and the second connection hole 12b are both threaded holes, the fixing member 7 is a fixing bolt, and the fixing member 7 is threadedly connected to the first connection hole 5a and the second connection hole 12b.

[0097] Alternatively, one of the first connecting hole 5a and the second connecting hole 12b is a threaded hole and the other is a round hole, the fixing member 7 is a fixing bolt, one of the first connecting hole 5a and the second connecting hole 12b is threadedly connected to the fixing member 7, and the other is plug-fitted to the fixing member 7.

[0098] Alternatively, the first connecting hole 5a and the second connecting hole 12b are both round holes, and the fixing member 7 is a fixing pin, which is inserted into the first connecting hole 5a and the second connecting hole 12b, and the fixing pin is interference fit with the first connecting hole 5a and the second connecting hole 12b.

[0099] Please continue to refer to Figure 1-Figure 3 The chuck 2 is vertically connected to the clamping section 11 and also includes an abutment 8, which is vertically connected to the clamping section 11, and the connection position is adjustable along the axial direction of the abutment 8. In the working state, the abutment 8 abuts against the corresponding end surface of the piston 01.

[0100] As configured above, the abutment member 8 can play a limiting role. When the loading and unloading tool moves to the point where the abutment member 8 abuts against the corresponding end surface of the piston 01, the piston retaining spring 02 can be just in the clamping groove 2a, which is convenient for the subsequent loading and unloading of the piston retaining spring 02. At the same time, the connection position of the abutment member 8 is adjustable along the axial direction, which can meet the loading and unloading requirements of different types of pistons 01.

[0101] There is no restriction on the connection mode between the abutment 8 and the clamping section 11 . For example, the clamping section 11 is provided with a threaded connection hole, the peripheral wall of the abutment 8 is provided with a matching external thread, and the abutment 8 is threadedly connected to the clamping section 11 .

[0102] Alternatively, the clamping section 11 is provided with a first mounting hole, the abutment member 8 is inserted inside the first mounting hole, and the clamping section 11 is also provided with a second mounting hole, the second mounting hole is perpendicular to the first mounting hole, the second mounting hole is a threaded hole, and further includes a fixed shaft, the peripheral wall of the fixed shaft is provided with a matching external thread, the fixed shaft is installed inside the second mounting hole, and the inner wall of the fixed shaft abuts against the peripheral wall of the abutment member 8. By twisting the fixed shaft, the fixed shaft can press the abutment member 8 against the inner wall of the second mounting hole to achieve the fixation of the abutment member 8; by twisting the fixed shaft in the opposite direction, the fixed shaft can loosen the second mounting hole to achieve the axial adjustment of the abutment member 8.

[0103] In practical applications, the two clamping arms 1 may adopt the same structure to facilitate unified processing.

[0104] The above is a detailed introduction to a tool for loading and unloading a piston retaining ring provided by the utility model. This article uses specific examples to illustrate the principle and implementation method of the utility model. The description of the above embodiments is only used to help understand the method and core idea of ​​the utility model. It should be pointed out that for ordinary technicians in this technical field, without departing from the principle of the utility model, the utility model can also be improved and modified, and these improvements and modifications also fall within the scope of protection of the claims of the utility model.

Claims

1. A tool for loading and unloading a piston retaining ring, characterized in that: The invention comprises two mutually connected clamping arms (1), wherein the clamping arms (1) have clamping sections (11), and the two clamping sections (11) can be relatively close to each other or relatively far away from each other; It also includes two chucks (2), which are detachably connected to the corresponding clamping sections (11), and the connection position is adjustable in the axial and circumferential directions. The two chucks (2) are correspondingly provided with clamping grooves (2a) at one end away from the clamping section (11). In the working state, the chucks (2) are inserted into the spring unloading grooves (01a) of the piston (01) one by one, and the piston retaining ring (02) is located in the clamping groove (2a).

2. The tool for mounting and dismounting a piston retaining ring according to claim 1, characterized in that: The clamping section (11) is provided with a mounting hole (11a), the clamping head (2) passes through the inside of the mounting hole (11a), the clamping section (11) is also provided with a limiting hole (11b), an angle is formed between the limiting hole (11b) and the axis of the mounting hole (11a), and the limiting hole (11b) and the mounting hole (11a) are connected to each other; It also comprises a limiting member (3), which is detachably mounted inside the limiting hole (11b), and the inner end of the limiting member (3) abuts against the peripheral wall of the clamp (2).

3. The tool for mounting and dismounting a piston retaining ring according to claim 2, characterized in that: The end of the clamp (2) away from the clamping groove (2a) forms a connecting section (21), and one of the connecting section (21) and the mounting hole (11a) has spline teeth evenly distributed along the circumference, and the other has spline grooves evenly distributed along the circumference, and the spline teeth can be plugged and matched with the spline grooves in a one-to-one correspondence.

4. The tool for mounting and dismounting a piston retaining ring according to claim 3, characterized in that: The end wall of the connecting section (21) has a scale mark (21a) arranged along the circumferential direction, and the corresponding side wall of the clamping section (11) is provided with an indication mark (11c) at a preset position, and the indication mark (11c) points to the scale mark (21a).

5. The tool for mounting and dismounting a piston retaining ring according to any one of claims 1 to 4, characterized in that: The two clamping arms (1) are hinged to each other, and the clamping arms (1) form the clamping section (11) on one side of the hinge point and a handle section on the other side. The two clamping arms (1) can rotate around the hinge point so that the two clamping sections (11) are relatively close to or relatively far away from each other.

6. The tool for mounting and dismounting a piston retaining ring according to claim 5, characterized in that: It also comprises an elastic component (4), wherein the elastic component (4) is connected between the two handle segments, and when the two handle segments are relatively close to each other, the elastic component (4) is compressed to store energy.

7. The tool for mounting and dismounting a piston retaining ring according to claim 5, characterized in that: One of the handle segments is a first handle segment (12), and the other handle segment is a second handle segment (12'). The second handle section (12') is provided with a through hole (12'a), and also includes a limiting rod (5), the limiting rod (5) passes through the through hole (12'a) and is connected to the first handle section (12), and also includes two adjusting members (6), the adjusting members (6) are fixedly mounted on the limiting rod (5), and the fixed position is adjustable along the axial direction of the limiting rod (5), and the two adjusting members (6) are located on both sides of the second handle section (12').

8. The tool for mounting and dismounting a piston retaining ring according to claim 7, characterized in that: The first handle section (12) is provided with a receiving hole (12a), the corresponding end of the limiting rod (5) is inserted into the receiving hole (12a), the corresponding end of the limiting rod (5) is provided with a first connecting hole (5a), the first handle section (12) is also provided with a second connecting hole (12b), the second connecting hole (12b) and the receiving hole (12a) are connected to each other, It also comprises a fixing member (7), wherein the fixing member (7) is connected to both the first connecting hole (5a) and the second connecting hole (12b).

9. The tool for mounting and dismounting a piston retaining ring according to any one of claims 1 to 4, characterized in that: The chuck (2) is vertically connected to the clamping section (11), and also includes an abutment member (8). The abutment member (8) is vertically connected to the clamping section (11), and the connection position is adjustable along the axial direction of the abutment member (8). In a working state, the abutment member (8) abuts against the corresponding end face of the piston (01).

10. The tool for mounting and dismounting a piston retaining ring according to any one of claims 1 to 4, characterized in that: The clamping groove (2a) is an arc-shaped groove or a rectangular groove.

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